使用 URL swift Alamofire 上传视频

我需要使用 alamofire 将视频上传到服务器。用户选择视频，我在 didFinishPickingMediaWithInfo 中成功获取 URL，如下所示：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        picker.dismiss(animated: true, completion: nil)
        if let pickedVideo = info[UIImagePickerControllerMediaURL] as? URL {
            print(pickedVideo)
        }
    }

然后我使用以下代码上传视频：

Alamofire.upload( multipartFormData: { multipartFormData in
            multipartFormData.append(videoUrl, withName: "video", fileName: "video.mp4", mimeType: "video/mp4")

        }, to: url, encodingCompletion: { encodingResult in
            switch encodingResult {
            case .success(let upload, _, _):
                upload.responseJSON { response in
                    if let JSON = response.result.value as? NSDictionary {
                        completion(true)
                    } else {
                        completion(false)
                        print(response)
                    }
                }
            case .failure(let encodingError):
                print(encodingError)
                completion(false)
            }
        })

它进入故障块，并显示以下错误：

multipartEncodingFailed(Alamofire.AFError.MultipartEncodingFailureReason.bodyPartFileNotReachableWithError(atURL: 文件：/private/var/mobile/Containers/Data/Application/C662AB0E-6A4F-40FB-9949-7F0A5AA2BA49/tmp/52C86F07-5DCC-413A-9F8C-71BBF33F793C.MOV -- file:///，错误：错误域=NSCocoaErrorDomain Code=260“无法打开文件“52C86F07-5DCC-413A-9F8C-71BBF33F793C.MOV”，因为 没有这样的文件。

您正在尝试通过 URL 上传视频，但这是不可能的multipartFormData需要上传数据而不是URL，所以首先将其转换为Data然后上传。

显示 uiimagePickerController 的功能仅适用于视频：

func showImagePicker(){
        let picker = UIImagePickerController()
        picker.delegate = self
        picker.mediaTypes = [kUTTypeMovie as String]
        self.present(picker, animated: true, completion: nil)
    }

UIImagePickerControllerDelegate功能，在选择视频后起作用：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
            picker.dismiss(animated: true, completion: nil)

            guard let videoUrl = info[UIImagePickerControllerMediaURL] as? URL else {
                return
            }
            do {
                let data = try Data(contentsOf: videoUrl, options: .mappedIfSafe)
                print(data)
//  here you can see data bytes of selected video, this data object is upload to server by multipartFormData upload
            } catch  {
            }
        }